Update PC Magazine
Edit Book: Live CSS: Fix going to style declaration in the editor not working correctly when the stylesheet contains @font-face rules
Update Outlook India
Edit Book: Fix import of DOCX files that contain no Table of Contents not working. Fixes #1327522 [error editor while importing docx](https://bugs.launchpad.net/calibre/+bug/1327522)
Edit Book: When importing DOCX files, set the media type for html files correctly
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__repr__ for font-face rule
Refactor the @rule parsers into their own methods for easier sub-classing